Model reduction strategy applied to a problem of crack propagation in anisotropic materials

Abstract : In order to predict the life of high pressure turbine blades, a damage tolerance approach must be set. This approach requires a study of crack propagation. Besides, these components can be made as single crystals which creates a challenge in studying crack propagation in anisotropic materials. Instead of running expensive elastic-plastic computations, an elastic analysis is applied over the whole structure while a confined elastic-plastic one, fed by the previous, is processed on the K-dominance zone around the crack tip. Kinematic displacement fields from these analyses are projected on a reduced basis in order to obtain a non-local condensed model that serves as an input for an incremental model. This condensed model gives a variation of blunting intensity factors of different modes as a function of the loading given through stress intensity factors.
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Contributor : Yoann Guilhem <>
Submitted on : Friday, September 1, 2017 - 1:44:31 AM
Last modification on : Friday, May 24, 2019 - 5:27:59 PM

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  • HAL Id : hal-01580036, version 1

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Walid Tezeghdanti, Yoann Guilhem, Sylvie Pommier. Model reduction strategy applied to a problem of crack propagation in anisotropic materials. 35ème Journées de Printemps, SF2M, May 2016, Paris, France. 2016. ⟨hal-01580036⟩

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